Have you explored integrating your project schedules with a PPM solution like CA's Clarity or Microsoft's Project Server?  I recently published an article on Tech Republic that addresses some of the issues integrating a project schedule and the appropriate level of detail. 

You can integrate and update a Microsoft Project schedule with a project portfolio management (PPM) tool such as CA Clarity or Microsoft Project Server. By doing so, you can achieve resource management, schedule management, time keeping, and objective project and portfolio metrics. When you incorporate standard reporting templates and integrated project schedule data, you quickly obtain a standardized view of the projects executing across the portfolio using real-time data.  However, the other side to consider is if a detailed plan is the right level to integrate with a PPM solution.  In other cases, a milestone level plan is sufficient as it doesn't require the resource management constraint.

Before integrating a Microsoft Project schedule with a project portfolio management (PPM) tool, there are five questions you should ask yourself.

Your can read the article here:

http://blogs.techrepublic.com.com/tech-manager/?p=2646